[Taxation] Types of GUI

The types of GUI and their usage are as follows:

GUI in triplicate A VAT-system business entity sells goods or services to another business entity (usually business-to-business)

GUI in duplicate A VAT-system business entity sells goods or services to a non-business entity

Cash Register GUI A VAT-system business entity uses a cash register to record its sales of goods or services 

Electronic Data Processing (EDP) System GUI A business entity (in both the VAT and special BT systems) uses the EDP system to record its sales of goods or services

Special GUI A special BT system business entity sells goods or services to buyers